计算: ( 1 2 ) - 1 - | - 3 | + 12 + ( 1 - π ) 0 .
计算:
计算: (1)()-1-3tan60°+; (2)(a+2)(a-2)-(a-1)2.
计算: (1) (2)
计算(每小题6分,满分12分) (1) (2)
(共计8分)计算: (1)+(﹣2013)0﹣()﹣1+|﹣3| (2)÷﹣×+.